I fasted once in college for world peace. I wouldn't do that again. It made sense at the time and I got through it on will power. It takes being undisabled good health to use those practices. The only reason I wanted to was for the protest. I am not an ascetic or a health hobbyist. If anything, I'm dubious about most health-hobbyist practices because they tend to do me a lot of harm on account of assorted disabilities. They may be fine for people who are physically standard to begin with.